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Another historian has decided to randomly sample artifacts from the above collection. He samples 30 artifacts...

Another historian has decided to randomly sample artifacts from the above collection. He samples 30 artifacts from this data set and gets a sample average of 81 years old S.D=14. Use this information to predict the actual average age of artifacts in the collection (assume we didn’t know it was 76) with

(a) 80% confidence

(b) 90% confidence

(c) 95% confidence

(d) 99% confidence

(e) 99.9% confidence

(f) What assumptions did we have to make to use the above math?

math   Statistics-And-Probability   
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Answer #1

cL 17.72S, gY-272) b) cT 1y 30 c) 95 , C-T J3o 15.1, 86.0 30 8 3.21 x11 5% 72.59, 89.41) * deda ast must be Sampledl randomly

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